Method of dyeing



ARTHUR LINZ, OF NEW YORK, N. Y., ASSIGNOR TC THE CHEMICAL FOUNDATIQN INCORPORATED.

METHOD OF DYEING.

No Drawing.

To all whom, it may concern:

Be it known that I, ARTHUR Lmz, a citizen of the United States, and a resident of the boroiu h of Manhattan, city, county, and State. of S ew York, have invented an Improvement in Methods of Dyeing, of which the following is a specification.

My invention relates to an improved method of dyeing and has as an object the obtainmcnt of more permanent and fast to light dyeings upon various materials, whereas such dyeings heretofore have been of a relatively fugitive and unstable character.

\Yhen various materials, such as for example, textiles, leather, hides, and so on, are dyed by the ordinary method, the colors are not always permanent and are sometimes affected by the light. It is an object of my improved method to obviate these possible objections and it is shown that when textiles, leather, and so on, are treated in accordance with-my method, the colors obtained thereon a re relatively faster and more permanent. The dyeings hereinbefore referred to depend upon the formation of color lakes and the previous processes for producing these lakes upon various materials are not of such a character as to permit of their general adoption, for the reason that these proces" are expensive in consequence of the chemicals employed therein, which chemicals may be produced only through the, expenditure of considerable time and labor.

The color lake formation upon textiles, and so forth, has been accomplished through the employment of complex acids containing tungsten, such as for instance, phosphotungstie acid and silicotungstic acid or salts of these complex acids. The preparation of the complex acids or the salts thereof with the attendant separation of the same from the by-products, is an involved, diflicultand expensive procedure, and accordingly their use has materially affected dyeings dependent upon the formation of the color lakes produced through the inter-mediation of such complex acids or their salts.

I have discovered a procedure for the dyeing of textiles, leather and so on, through the formation of color lakes produced through the use of compounds containing phosphorus and silicon, which shall, during theproee-dure, interact with compounds containing a difficultly. fusible metal, which prolifi cedure does not involve the production and Patented Apr. 25, 1922.

Serial No. 497,706.

isolation of complex acids of difiicultly fusible metals or salts of diiiicult-ly fusible metals and hence accomplishes a saving of all the expense incident thereto. I

Further, in consequence thereof my proc ess presents a mode whereby color lakes may be generally applied in dyeing the various materials and at a cost which will admit of their general use and application.

The process according to my invention, comprises an after treatment of the dyeings of textiles, leather, and so on, with compounds containing phosphorus and silicon together With compounds containing a diffieultly fusible metal, of which compounds various ones may be used such as, for instance, the acids, that is phosphoric or silicic or their salts, and compounds of such metals as tungsten or molybdenum, and in accord ance therewith it has been aseertainedthat such dyeings of textiles, leather, and so on, are relatively permanent.

The following example will serve as an illustrative embodiment of a manner in which my process may be carried into practical effect:

Eam-mple 1.

Take a quantity of textile, leather, hides,

skins or the like, (for example 01m hundred antimony salt, or tannin bearing extracts and dye in the usual manner with say about sodium phospho molybdate or phospho molybdie acid. The above salts are added in an amount sufficient to produce about five pounds of the complex salt or its equivalent. The subsequent treatment may be done in. the usual manner at ordinary temperature, although it may be considered preferable to carry out the treatment at a tempera-- true, about 70 C.

When it is desired to employ salts of an acid of phosphorus or silicon, together with salts of a ditlicultly fusible metal, it may be found preferable to add to the dyeing bath a. uitahle organic or inorganic acid which acid shall be capable of freeing phosphpric, tungstic, molybdic and silioic acids their respective salts, for which pur ose there may' 'n'eferabiy be used hydrochloric acid, suhiburic acid and acetic. acid, which will not etl'e-ct the coloring matter being used, and it will be understood, otcourse, that such acid may be entirely dispensed with it the formation of the color lake takes place satisfactorily without its use, and this may be readily determined by simple treatment.

The dyestuffs which may be preferably utilized in my process are usually (ilesignated as the basic. coal tar dyes and in addition to methyl vi let set forth in the above example,

there ,y be employed such dyestuits as auran'iine, phosphin, chrysoidin, Bismark brown, malachite green, cine 'ald green, methylene blue, Victoria bluc, crystal violet, s n aaine and basic fuchsin, but it will be understood that my process is not limited to the specific class or the specific dyes'herein mentioned, but may be employed for such dyes as will give a permanent and fast color through fixation by means of the compounds set forth.

1 claini:

l. The JURCQSS of dyeing textiles, leather, and so on, \fwlCll Z-oinprises dyeing the said materials with a basic dyestutl', and then i ding; said dyed materials with a solution which has been prepared from a soluble, compoundof tungsten and soluble compound of phosphorus. i

5. The process of dyeing textiles, leather, and so on, which comprises dyeing the said materials, and then treating; said dyed mateials with a solution which has been prepared from a soluble compound of phosphorus, a soluble compound of tungsten, and an acid capable of freeing the acids of phosphorus and tungsten from their respective salts and which does not affect the coloring matter.

Ill. The process oi dyeing tcxti cs. leather, and so on, which comprises dyeing the said materials with a basic dyestui'l'. and then aid dyed, materials with a .solution iccn prepared from a soluble coinpL-zspleoiu and :--'.olul, lc coma dilii'cultly fusible metal. process oi dyeing textiles, leather, which comprises dyeing; the said i then treating" said dyed matcit isolutiou which has been prepared 1min a ompound ol' phosphorus, a E'Hl'l i' pound of tungsten and an acid capable of l'rcci: the acids of phoi-apborus and tungsl'co zroni their respective salts and which wil i'orni a double salt of tungsten in the pr oi a coloring matter withoutdes: v ing said coloring: matter.

*ihe process of dyeing textile, leather,

and so on, which comprises dyeing; the said materials, and then treating said dyed materials with a solution which has been prepared -from a phosphate of sodium and a compound of tungsten.

(5. The process of dyeing textile, leather, and so on, which comprises dyeing the said materials, with a basic dyestutl', and then treating said dyed materials with a solution which has been prepared from a compound of phosphorus and a. tungstate.

7. lhe process of dyeing textile, leather, and so on, which comprises dyeing the said materials, and thenlreating said dyed materials with a solution which has been prepared from a phosphate of sodium and a tungstate of sodium.

8. The process of dyeing textile, leather, and so on, which comprises dyeing the said materials, and then treating said dyed materials with a solution which has been prepared from a compound of tungsten and a dismliiun phosphate.

9. The process of dyeing; and so on, which comprises dyeing the siid materials, and then treating said dyed materials 'with a solution which has been repared from a compound of phosphorus and sodium tungstate.

10. The process of dyeing textile, leather, and so on, which comprises dyeing the said materials, and then treating: said dyed materials with a solution which has been prepared from a sodium tungstate and disodium phosphate.

ii. The process of dyeing textile, leather, and so on, which comprises dyeing the said materials, and then treating said dyed materials with a solution which has been prcpared from di-sodinm phosphate, sodium tungSt-ate and an acidkaaumble of freeing the acids oi phosphorus and tungsten from their respective salts and which \vill't'orin a double salt of tungsten in the presence of a coloring matter without destroying said coloring matter.

12. The process of dyeing textile, leather,

textile, leather,

and so on, which comprises dyeing the. said materials, and then treatin; said dyed mate rials with solution. which has been prepared iron: sodium tungstatc, di-sodiuni phosphate and acetic acid.

13. The process of dyeing textile, leather, andso on, which com 'irises dyeing the said materials, and then treating: said dyed materials with a solution which has been prepared tron! sodium tungstatc, (ii-sodium phosphate and an acid capable of tracing the acids of phosphorus and tungsten from tlici r respccti ve salts.

In testimony whereof, T have signed my name to this specification this th day of August, i321.

ARTHUR LINE. 

